From mboxrd@z Thu Jan 1 00:00:00 1970 From: YOSHIFUJI Hideaki Subject: [PATCH 4/6] ipv6: 64bit version of ipv6_addr_set(). Date: Tue, 15 Jan 2013 02:10:24 +0900 Message-ID: <50F43C00.9060808@linux-ipv6.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-2022-JP Content-Transfer-Encoding: 7bit Cc: yoshfuji@linux-ipv6.org To: davem@davemloft.net, netdev@vger.kernel.org Return-path: Received: from 94.43.138.210.xn.2iij.net ([210.138.43.94]:39841 "EHLO mail.st-paulia.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1757232Ab3ANRK0 (ORCPT ); Mon, 14 Jan 2013 12:10:26 -0500 Sender: netdev-owner@vger.kernel.org List-ID: Signed-off-by: YOSHIFUJI Hideaki --- include/net/ipv6.h | 26 ++++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-) diff --git a/include/net/ipv6.h b/include/net/ipv6.h index 77cef332..fb7f7c6 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -355,14 +355,32 @@ static inline void ipv6_addr_prefix(struct in6_addr *pfx, pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); } +static inline void __ipv6_addr_set_half(__be32 *addr, + __be32 wh, __be32 wl) +{ +#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 +#if defined(__BIG_ENDIAN) + if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) { + *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl)); + return; + } +#elif defined(__LITTLE_ENDIAN) + if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) { + *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh)); + return; + } +#endif +#endif + addr[0] = wh; + addr[1] = wl; +} + static inline void ipv6_addr_set(struct in6_addr *addr, __be32 w1, __be32 w2, __be32 w3, __be32 w4) { - addr->s6_addr32[0] = w1; - addr->s6_addr32[1] = w2; - addr->s6_addr32[2] = w3; - addr->s6_addr32[3] = w4; + __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2); + __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4); } static inline bool ipv6_addr_equal(const struct in6_addr *a1, -- 1.7.9.5